<!DOCTYPE HTML>
<body style="margin: 0">
<label><input type="checkbox">Show test</label>
<label><input type="checkbox">Use solid colors</label>
<br>
<span>Expected Invalidations</span>
<canvas id="canvas" width="2000" height="2000" style="border: 1px solid black">
<script>
  var context = canvas.getContext("2d");
  context.fillStyle = 'rgba(255, 0, 0, 0.25)';
  context.fillRect(60, 50, 10, 10);
  context.translate(193, 131);
  context.scale(5, 5);
  context.rotate(Math.PI/4);
  context.fillRect(20, 20, 10, 10);
</script>
